Telephone system



I Sept. 29, 1931. K F. KESSLER ET AL I 1,825,000

TELEPHONE SYSTEM Fild May 11, 1929 4 Sheets-Sheet l l ffi'r'en tur 5 Frank Kessler' HZEFFI' G E Fife IE Sept. 29, 1931. F. KES'SLER ET AL 1,825,000

TELEPHONE SYSTEM Filed May 11, 1929 4 Sheets-Sheet 2 Fig; 2 y I O 1 E u u n J -5 T to I I 8 W l u u n J A F ho [I n n n J 5 W 1 0 u u F l0 0 I i u u I j i II %/I V IO 0 u I u v 1mm Frank Ksssler HIE EFT GEE PEP 51F? Sept. 29, 1931. i KESSLER ET AL 1,825,000

TELEPHUNE SYSTEM Filed May 11, 1929 4 Sheets-Sheet 3 [W Frank Kessler HZTI'TEEDZEE Fm Sept. 29, 1931- I; I F. KESSLER ET AL 1,825,000

TELEPHONE SYSTEM Filed May 11, 1929 4 Sheets-Sheet 4 llllllll iii-il aten'ted Sept. 29, 1931 CORPORATION DELAWARE The pres nt invention relates to interconnecting arran ements for 'use in telephone" systems and is more particularly ooneerned with the mountin f the terminal strips or 13 the like upon Which the connections from the banks of automatic switches are tennin'aiied. It is of course Well known that'the i for tliis i'eason if for no othei it is undes'iiable that the; e'on'neoti n should be er; insnent', but rather should be so arrang d that stibseqnent alterations can be lllad p with th ininiinninjof trouble and disloos tion. It is usual to mount automatic swito'hes on raeks'in' horizontal rows which are known as shelves and generally coin priseeither '10 or ejo'vswitehes end the connefotio'ns from the henk contacts are then taken to terminal strips at one end of the rack, th terminals associated ,with the various 7 levels beingarranged horizontally,

preferabl at siihsteiitielly the some height esthe shelf towliioh they belong.

This, errsngeinenthes the disadvantage that since the number of eoht'eots in e level is usually and moreover since the ,difiere t eont ets engaged by the various wipers of a usually. staggered on the terminal block to perniit bere wire in iltipling to take pleoethe overall Widthof the terminal block becomes excessive moreover the to llTOllHt-HTOIB thEIHifiVG or at the mostsix V shelves of switches one above another owing to limitations of height and, accordingly s sin-ceall the switches ofe shelf will usually be rnnltiplied together, I if .the terminal blocks are arranged so that the contacts corresponding to the various shelves are arranged horizontally mtherthan Vertically "as was previous practice a considerable saving in the horizontal dimensioh of the 'ter:

*"npingoi th swit he-s will enerally reqn n-e' to be ehenged from time to'tnne and PATENT om ns V FRANK nnssnnn Ann htn'nnr enonen ronsrnn or mvnn'roon, nwemnn, ASSIGNOBB To sssoomrnnrnnnrno rn Ann TELEGRAPH cerium, on CHICAGO, inmn'ois, A

TELEPHONE sYsm'EM' I 7 Application filed Meiydl, the, Serial 110,362,194, and m Great Britai-nlulf 2, 1928. r

minal stripseen heeheeted-and' a generally more compact mounting seoured.

According tothe invention,therefore, a

mounting errangenient is provided for termilllal blocks of eutoinetioswitohes in which theterniinels to which the contacts of the.

enous she lves of switches are eonn 'oted aieinonnted adJZL'CEIIt to one another in e h rizontalrow so as to reduce the horizonto tail dimension of the terminalfrenie.

Ae-eordingto another featur of the in;

rentio the connections from the banks of the switehesere terminated on standard tag blocks arranged one above the other with th ir longer dimension vertical. 7

I The invention will bebetter understood from the following description or one method of arrying it into eiieet which should be taken in ponjunctipn with the 'aoto oinpanying' drawings; These drawings show a preferred embodiment but it will be understood that'verions modifications could be niedein the constructionaldetails without exceeding. thesco'pe of the invention.

Referring now to the drayvings, Fig.1is a front elevation of a part of arse]: with its c rr sponding termint ilassembly nrounted at the right hand end andshow's also the terminal assembly of e' simii ar reek whi h is not sh wn but would heQlOpa'ted on the flht ofthe figu e. -Fig. 2 shows on some W 1 and"teihiihaljtlssm y ShbWfi n F g- Fig. 3 is enenlargedviewcorresponding to Fig. and 'errn ts; a better grasp of the smaller deta'i s.j Figipe shows dlagfainmatl call'y a portion ofthe two adjacent terminal blocks and illiistr'ates; the a'irztngement for at larger scale a back View of thera'ck i bere wire ninlti'pling between the terminal s blocks oiedjhoent'rstolrs. Fig. 5 is a diagrsin nstie plan view fthe'two racks under consideration, while i Fig, re resents "an alternative arrangement in which the racks are buttedtogether "at the ends. remote from theirt'erininel blocks so that these latter oonie on the outside, 7 V

Referring now to Figs 1-, 2 and 3 th rack comprises the usual main uprights 1 con-.

nected by'the cross membersQ corresponding to the individual shelves. These cross mem-' bers are connected by the vertical members 3 which are provided with the usual bayonet pins permitting the switches to be detachably mounted thereon in well-known manner. The uprights 1 terminate in the feet 4 which are of suitable shape and sufiicient size to distribute the weight of the rack over an appropriate portion of the floor area. The switches 5 ofone shelf and their associated banks 6 are shown in position and it will be back' of 'th'eblock s and is therefore more clearly seen in Fig. 2 is indicated at 9'. The switches shown are presumed to be provided with 400-point banks so that if each tag block is provided with rows of contacts as is convenient, 16 tag blocks in all will be necessary for terminating the various connections of a rack of switches. I

As is well appreciated by those skilled in the art there arethree sets of connections which require to be made to the terminal blocks, firstly the bank cabling whichis of a permanent nature and is preferablyterminated at the rear, secondly the so-called umpering which comprises the connections from the terminal block to the outgoing trunk lines and thirdly 7 the commoning necessary in a.

large system between the various-shelves of switches which is preferably effected by bare wires though insulated wires may also be used. With the arrangement shown, the cemmoning'fwires can be veryfshort and this in addition to facilitating manipulation of these wires, considerably reduces any danger of ind'uctive disturbance arising between the various circuits. .It' is generally considered desirablefthat the commoning and umpermg should both be done on the front of the terminal blocks so that any alterations which may need to be 'made subsequently in these con nections will not disturb the permanent bank cabling. In this case the tags are provided withv a singleno tch atthe back and a double notch at the frontso that the necessary soldered connections may readily be made. In

some cases, however, it may be considered desirable to have the jumpering and common mg on opposite sides of the block as then alterations to one can be made without disturbing the other, and in this case the portion of the tag with the double notch will require to be at the rear. This however is easily taken care'of by merelyreversing the block.

7 It will be appreciated that with the arrangement shown in Figs. 1, 2 and 3 and diagrammatically in Figs. 4 and 5, commoning between adjacent racks can be readily effected by merely extending the bare wire or alternatively covered wire connections 16 across from one terminal block to the other.

In case however this is not possible for instance with the arrangement of Fig. 6 or wherethecommoning has to be extended toother racks, it may readily be done by the use of jumper wires or tie cables, conveniently connected between vertical rows of terminals which are preferably specially provided for this purpose at either end of the switch terminals as shown clearly in Fig. 4. Asmay be seen from Fig. 1 the rack is assumed to comprise only 5 shelves and of the 7 vertical'rows of terminals shownin Fig. 4 the first and last are'set aside for making connections if'necessary of switches respectively. I

' The separate terminal blocks which are required for the outgoing trunks are in this case preferably mounted separately on the front of the frame at substantially the height corresponding to the tag block terminals of the level in question as shown at 10. By this means the length of the umper wires required is reduced to a minimum and this arrangement therefore has advantages over the arrangement hitherto employed in which all the terminal blocks are located atthe top of the frame. It may be convenient also to mount on the front of the terminal frame analysis metering or similar equipment and this is indicated at 11, it being understood that the panel shown is mounted at right angles to the plane of the rack. This however is by no means essential and the panel can be mounted at the most convenient angle and at any suitable height. It is generally considered desirable nowadays also to provide that switches are routine tested at regular intervals and for this purpose special access switches are necessary for connecting the switches under con: sideration with the routining equipment. It will probably therefore be economical to mount these routine testing switches also on the terminal frame and a pair of such switches are shown at 12,,a tag block associated with them being also mounted on the front at 13.. The arrangement preferably includes alsometal covers 14: whichare mounted at the back of theterminal blocks and serve to protectthe terminals and bank cabling from in-v jury. Miscellaneous relay groupsmay conveniently be mounted on the plates 15 suitablylocated between the switches 'and the terminal blocks or on the terminal frame occupying the same mounting space as the outgoing terminal blocks 10.

According to the invention, therefore, an

interconnecting arrangement has been devised which economizes space and givesmore to' the preceding and subsequent'ranks memaoo satisfactory results than arrangements hitherto employed, while at the same time since the rack and its terminal assembly forma self-contained unit it is possible to eflect the majority of the cabling, jumpering and commoning before the, unit leaves the factory so that the work necessary on the site Where conditions may be less advantageous is reduced.

lVhat we claim as new and desire to secure by Letters Patent is l. The combination with a switch supporting rack, of a plurality of shelves of auto matic switches mounted thereon, a distributing frame comprising a plurality of'parallel vertical rows of terminal pins, each of said rows corresponding to one of said shelves, and multiple connections between the bank contacts of the respective shelves and the corresponding row of terminal pins.

2. The combination with a group of automatic switches, of a contact bank for each switch, multiple connections between corresponding contacts of each bank, a connecting rack comprising a single vertical row of terminal pins, and multiple connections from the contacts of the last bank of the group to successive ones of said terminal pins.

3. The combination with groups of multicontact banks, of multiple connections between corresponding contacts of the banks comprising each group, a connecting rack comprising a plurality of vertical rows of terminal pins, each row corresponding to one of said bank groups, and multiple connections from the contacts of one bank of each group to the terminal pins of the corresponding row.

4. The combination with a rack supporting a plurality of shelves of automatic switches, of a bank multiple for each shelf of switches, a connecting cable from each bank multiple, and a plurality of parallel V8I'4 tical rows of terminal pins, each of said row terminating one of said cables.

5. The combination with a rack supporting a plurality of shelves of automatic switches, of a bank multiple for each shelf of switches, a connecting cable from each bank multiple, a plurality of parallel vertical rows of terminal pins, each row terminating one of said cables, and an inter-shelf multiple comprising connections between corresponding pins of each vertical row. I

6. The combination with a plurality of racks each supporting a plurality of shelves of automatic switches, of a bank multiple for each shelf of switches, a connecting cable from each bank multiple, a cross-connecting terminal for each rack comprising a plurality of parallel vertical rows of terminal pins, each row terminating one of said cables, an inter-shelf multiple comprising connections between corresponding pins of each row, and an inter-rack multiple comprising jumper 1'37 .rinter connecting arrangement 1? for automaticxswit'chboardstin Which-automatic switches. are mounted: onzshelves on .a supportiiiga rack and an 'which "the i complete hank multiple ofeach shelf of switches iistconnected tozias-rgroup :of terminal pins iarrangedlin'. =1a single: vertical terminal zblocks. supporting. said rows of :pins in parallel ipesitioniwi-th corresponding .pins: of ieanhfrow .ali'gned. in

the samei ho'rizontal-iplane, :ianclzeneans for mounting inal2blocks on the s P ing rack.

. -i8.= An dntereconnecting artrangement: for

automatic"-swsitchboairdsi in which automatic switches: are mounted on shelves: on- ;a: supporting: rack and in. @whichthe r complete ibank m ultip e of each' Sl'lGlfEOf "switcheshisvconnected fto-a {group of zterminal pins arranged in 1 a; single vertical row, terminal :"bloc-ks supporting. said-rows of; pins rinf parallel: .positions wiith corresponding. pi'ns 0f -eachrow aligned in the same horizontal :plane, and 1 multiple connections between said lionizota'lly aligned pins. 'i f '9. win winter-connecting :arrangement :cf'or automatic switchbcardsnin whiclr automatic switches are mounted on shelves-on a supportingrrackiand in' which the complete bank multipleofreach shelfisconnect'ed to a group of terminal pins disposed :in single vertical row, ian 1 additional vertical row 'of' terminal pins -forfitermina'ting: jumper cablesaextending to adj acenta racks, and'"terniinalublocks supporting-said rows of: pins parallel :po si-tionsgwith corresponding-pins of each row aligned inthesame horizontal plane;

10. An inter-connecting arrangement for automatic switchboards lIlzWlliCl'l automatic switches are mounted onvshelves in a 1 supporting rack and inwhich the complete bank 1 multiple of-each shelf'is connected toagroup of terminal :pins disposed in .a- :single vertical row', --.an-:additional: vertical rowv of terminal pins .Tfor terminating j umperca'bles extending tosadjacent racks, terminal :blocks supporting-said rows ofzpins parallelqpositionswith corresponding pins-of .eachrow aligned in-vathe samedhorizontal; plane, and multiple connections between saidhorizontally aligned p -"fl,v r

11 In a, telephone a system, an automatic switch .supportingcrack, gall interconnecting rack assembled integrally with said-j support- "ing rack, and a single vertical row of: terminal pins on said interconnecting rack for each shelfjposition-s on? the supporting; rack.

.12. In a telephone system, an automatic switch supporting rack, an interconnecting rack assembled integrally with said first rack, a single vertical row of terminal pins on said second rack for each shelf position on said first rack, and an additional row of vertically disposed terminal pins for multiplying with the interconnecting racks of adjacent supporting racks. v 13. In a telephone system, an automatic switch supporting rack, an interconnecting rack assembled integrally with said first rack, a single vertical row of terminal pins on said interconnecting rack for each shelf position on the supporting rack, and a removable metal cover on saidinterconnecting rack for protecting saidterminal pins from injury. v 14. In a telephone system, an automatic switch supporting" rack, an interconnecting rack'assembled integrally with said first rack, a single vertical row of terminal pins on the second rack for-each shelf position on said first rack, terminal blocks mounted on said first rack adjacent to said second rack, and terminal pins in said blocks for terminating the conductors of outgoing trunk cables.

15. In a telephone system, an automatic switch supporting rack, an interconnecting rack assembledintegrally with said first rack, a single vertical row of terminal pins on the second rack for each shelf position on the first rack, outgoing trunk and multiple cable terminating pin blocks mounted on the first rack adjacent to the second rack, and jumper cables for connecting theterminal pins of the rack with the pins of the blocks.

16. In a telephone system, two adj acently mounted switch-supporting racks each equipped with an integrally-assembled interconnecting rack located respectively at'the adjacent ends of the supporting racks, a Ver-' tical row of terminal pins on each interconnecting rack for each shelf position of the associated supporting rack, and a vertical row of terminal pins on each interconnecting rack for connecting the two racks.

17. In a telephone system, two adjacently mounted switch-supporting racks each equipped 'with an integrally-assembled interconnecting rack located respectively at the adjacent ends of the supporting racks, a

plurality of parallel vertical rows of terminal pins on each interconnecting rack, each of said rows terminating a bank cable from one of the shelf positions of the associated sup porting rack, and an additional vertical row of terminal pins parallel with said other rows on each of-said interconnecting racks, said additional rows of terminal pins terminating a multiple cable connecting the two'racks.

In testimony whereof we have signed our names at Liverpool, England,this 18th day of April, 1929.

I FRANK KESSLER.

ALBERT GEORGE FORSTER. 

